Rosemary Beach is an unincorporated planned community in Walton County, Florida, United States on a beach side road, CR 30A, on the Gulf Coast. Rosemary Beach is developed on land originally part of the older Inlet Beach neighborhood. The town was founded in 1995 by Patrick D. Bienvenue, President of Leucadia Financial Corporation, and was designed by Duany Plater-Zyberk & Company. The town is approximately 105 acres and, upon completion, included more than 400 home sites and a mixed-use town center with shops, restaurants, and activities. The population of Rosemary Beach is approximately 4,328.